A lack of reliable criteria for designing tile drainage systems
in the Willamette Valley has lead to tile drainage installations in a
given soil series being based on general observations of previous
drain performance in the series. Relatively few quantitative measurements,
which would aid in designing economical installations,
have been...
Published September 1963. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Published July 1965. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Vitamin E (vitE) is a group of lipid-soluble antioxidants- of which alpha-tocopherol is the most biologically active and only form considered to be an essential nutrient. Through preferential binding and trafficking, the alpha-tocopherol transfer protein (α-TTP) regulates the concentration of vitE in the body. The impact of vitE deficiency on...
The purpose of this investigation was to develop a
valid and reliable instrument to assess Oregon high school
students' nutrition information.
The following steps were taken in order to achieve this
purpose.
First, a review of the literature pertaining to high
school nutrition curriculum was conducted.
Second, numerous published tests...
The electrochemistry of the lithium-potassium-sodium
carbonate-borate melt was explored by voltammetry and chrono-amperometry. In support of this, a controlled-potential polarograph
and associated hardware was constructed.
Several different types
of reference electrodes were tried before choosing a porcelain membrane electrode containing a silver wire immersed in a silver sulfate
melt.
The...
This work combines both applied and basic research regarding previously undescribed relationships between two ecologically and economically important insect groups in coniferous forests, bark beetles (Coleoptera: Curculionidae, Scolytinae) and wild bee (Hymenoptera: Apiformes) communities in Western North America. Across the continent, native bark beetle outbreaks are key drivers of structural...
Published March 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog